Question

Example 1.6: A tiny stone of mass 20 g is
tied to a practically massless, inextensible,
flexible string and whirled along vertical
circles. Speed of the stone is 8 m/s when
the centripetal force is exactly equal to the
force due to the tension.
Calculate minimum and maximum kinetic
energies of the stone during the entire circle.
Let 0 = 0 be the angular position of the
string, when the stone is at the lowermost
position. Determine the angular position of
the string when the force due to tension is
numerically equal to weight of the stone.
Use g = 10 m/s2 and length of the string
1.8 m​

Answer 1

Answer:

Example 1.6: A tiny stone of mass 20 g is

tied to a practically massless, inextensible,

flexible string and whirled along vertical

circles. Speed of the stone is 8 m/s when

the centripetal force is exactly equal to the

force due to the tension.

Calculate minimum and maximum kinetic

energies of the stone during the entire circle.

Let 0 = 0 be the angular position of the

string, when the stone is at the lowermost

position. Determine the angular position of

the string when the force due to tension is

numerically equal to weight of the stone.

Use g = 10 m/s2 and length of the string

1.8 m